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Doctor insights on: Functional Residual Lung Capacity

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Why does residual volume decrease in restrictive lung diseases?

Why does residual volume decrease in restrictive lung diseases?

Scarring: As the lungs scar and lose volume, both the vital capacity and residual lung volume decrease. That is the nature of restrictive lung disease. ...Read more

Lung (Definition)

Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the ...Read more


Dr. John Chiu Dr. Chiu
6 doctors agreed:
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Spirometry results essentially normal spirometry. Hyperinflation questionable the single breath diffusing capacity is moderately impaired. COPD?

Dr. John Chiu Dr. Chiu
6 doctors agreed:
Spirometry results essentially normal spirometry. Hyperinflation questionable   the single breath diffusing capacity is moderately impaired. COPD?

Possible: A reduced DLCO/Va points to damage or scarring in the lung tissue and emphysema (especially if you have been a smoker) or other interstitial lung diseases may be the cause. The normal lung function however is not compatible with COPD but then I don't understand what you meant by hyperinflation in the presence of normal lung function test. See a pulmonologist. ...Read more

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Does caffine improve lung function ?

Does caffine improve lung function ?

Marginal at best: Caffeine is a xanthine, a chemical similar to aminophylline, a drug we used for years to treat the disease. It is too short acting to be very helpful. It does not appear to aggravate asthma, but I would never rely on it as a form of treatment. ...Read more

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My spirometry:slight restrictive shape of curve.Moderate expiratory limitation.Examination for extrathoracic obstruction & expiratory trachealstenosis?

My spirometry:slight restrictive shape of curve.Moderate expiratory limitation.Examination for extrathoracic obstruction & expiratory trachealstenosis?

HRCT: Extrathoracic obstruction may result in changes in airflow both on inspiration and expiration depending on where the obstruction is located. If your physician is investigating an extrathoracic cause, an HRCT is indicated. Sometimes enlarged lymph nodes may impinge on the airway as one possible cause. The restriction is mild and may be due to a number of causes such as fibrosis or scarring. ...Read more

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Does a double lung transplant completely eliminate lung problems for cystic fibrosis patients?

Does a double lung transplant completely eliminate lung problems for cystic fibrosis patients?

It should: Cystic fibrosis is a genetic condition causing significant lung dysfunction. A double lung transplantation replaces the native lungs with supposedly normal lungs, eliminating the problem, but replacing it with problems directly related to transplanted lungs, i.e. Chronic rejection or bronchiolitis obliterans. ...Read more

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Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Result of spirometry, it means?

Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Result of spirometry, it means?

Makes no sense: This sounds like a computer generated report that might have been mis-interpreted by you. Regardless, minor changes in pfts cannot be interpreted out of context, just like strange noises your car makes cannot be diagnosed without looking at the car. ...Read more

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Does age effect the lung capacity?

Does age effect the lung capacity?

Yes: After age 30, everyone's lung function declines a little every year. More so if you smoke or have other lung diseases. ...Read more

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Good food to improve lung capacity?

Good food to improve lung capacity?

none: There is no special diet or supplements for that. Avoid pollution (esp in india), do not smoke, exercise, and eat healthy food daily (low oil, no ghee at all, limit meat, and limit sugars/sweets). ...Read more

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Lingular atelectasis and lung cancer relationship?

Lingular atelectasis and lung cancer relationship?

Depends: Is the lung cancer also in the lingula sometimes the cancer plugs the airway and causes distal collapse(atelectasis) also pneumonia, cancer and atelectasis are part of COPD due to smoking. ...Read more

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Non sustained VT<30sec more concern in patients with Left Ventricular Impaired function compared to Normal LV function normal heart ejection fraction?

Non sustained VT<30sec more concern in patients with Left Ventricular Impaired function compared to Normal LV function normal heart ejection fraction?

Yes, but concern: NS Ventricular tachycardia has a higher degree of concern in patients with impaired ejection fraction. However, the larger concern is that having runs of nonsustained VT are not particularly common in the normal population, so even in patients with normal EF, would still be concerned about ischemic heart disease in patients who are having runs of NS VT. ...Read more

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Would lung cancer cause enlarged hilar and mediasternal nodes, GGO on Chest CT and impaired gas exchange. Other lung function tests are normal?

Would lung cancer cause enlarged hilar and mediasternal nodes, GGO on Chest CT and impaired gas exchange. Other lung function tests are normal?

Possibly: There are many different forms of lung cancer however the most common types usually appear as a solitary nodule or mass on CT. GGO can be seen with lymphatic involvement as is suggested by the enlarged lymph nodes described. This can be from infection, cancer or autoimmune diseases such as sarcoidosis and even heart failure. A biopsy of an enlarged lymph node may be required. ...Read more

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Does lung transplant increase life expectency cf?

It depends: The transplant center will evaluate whether based on their transplantation survival statistics and your clinical disease severity, whether the benefits outweigh the risks. The allocated organs are received first by the patients who are the most severe, and most likely to benefit from an organ transplantation. Transplantation centers will have information on this for you. I hope that this helps. ...Read more

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70 % lung function - will this patient require oxygen?

70 % lung function - will this patient require oxygen?

Not really: Pt should have abg done and if oxygen level is less than 55, pt will need oxygen, ( or o2 sat <88%). ...Read more

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Residual thymic tissue mild activity SUV 1.5. On PET Scan normal?

Residual thymic tissue mild activity SUV 1.5. On PET Scan normal?

GoBackToThePetBox: At your age the thymus is considered a residual organ, kind of like your appendix.Now,there are some theories as to its function later in life (an immune function or whatever),but overall it just sits there.Of course,it's made of living tissue so there will be some"activity"in it & rarely,can develop a tumor or infection.But in your case who knows?The people who ordered the test in the first place ...Read more

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What does it mean if residual volume decrease in restrictive lung disease?

What does it mean if residual volume decrease in restrictive lung disease?

Expected: Residual volume is the volume left in your lungs after you exhale completely. In general, restrictive lung disease (rld) decreases your lung volumes, including total lung capacity and residual volume. A simplified comparison can be to stretching a very tight rubber band - same as not being able to inhale and stretch your lungs to normal capacity. Hope this helps! ...Read more

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Can mechanical ventilation aid lung cancer patients?

Can mechanical ventilation aid lung cancer patients?

No: It is not a cancer treatment. Occasionally it may be needed during lung cancer treatment (as in some cases after lung resection) but it is a supportive treatment. ...Read more

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